I agree having a controlled mouse/cursor movement is key to a successful video. When I help people to create effective videos with Camtasia, I always discuss the mouse movement and advise to only move the mouse when it needs to perform a function, and to move it purposefully. Too many people 'talk' with the mouse. I'm not aware of a trick, but you could remove the cursor that's been recorded (by changing the opacity to 0%) and replace with an image of a cursor and add an animation every time you want it to move on your canvas. I hope this helps.